Processess are not killed

Hi there,
I have a RedHat 9 in my machine. I am using directadmin control panel. I experiencing a strange problem with the processess listing by the TOP command. I have only one domain in that machine; whenever i type the url for this domain and open any forum thread and make refresh for several times and keep trying to refresh for some time. I can see the increasing processes by TOP command (in the top 20 processess there are nothing strange; but internally it creates too much processess and don't kill at all). When reaching 1300 processess (upon which 6 or 7 are running and the rest of are sleeping) apache goes down also server has very much high load.
I really don't have any idea why not the processess are not kill automatically.